Configure Outlook not to display autodiscover certificate errors for certain domains

by sircles on Sep 08, 2016 in Domain Names, Internet, Internet Security
Close Outlook. Start Registry Editor. To do this, use one of the following procedures, as appropriat
  1. Close Microsoft Outlook first.
  2. Start Registry Editor. To do this, use one of the following procedures, as appropriate for your version of Windows.
    • Windows 10, 8.1 & 8: Press [Windows Key + R] to open the 'Run' dialogue; type regedit and then click OK.
    • Windows 7: Click the Start button, then type regedit in the search box, and then press Enter.
  3. Locate and then highlight this subkey (yellow folder):
    HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\AutoDiscover\RedirectServers |  xx.0  is your office version (2016 is 16.0 and 2013 is 15.0 etc.)
    You can use the following registry subkey instead if you wish:
    HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\xx.0\Outlook\AutoDiscover\RedirectServers
  4. Click the Edit menu, point to New, and then click String Value.
  5. Type the name of the HTTPS server to which AutoDiscover should connect without warning the user, and then click OK. To allow connection to https://*.sircles.net, the first String Value (REG_SZ) name would be as follows:
    sircles.net
  6. You should not add text to the Value data field. The data column must remain empty any string values you add.
  7. To add further HTTPS servers to which AutoDiscover can connect freely to, repeat steps 4 and 5 for the appropriate URLs.
  8. You can now exit Registry Editor.

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